:root{--font-sans: "Space Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono: "JetBrains Mono", "SF Mono", Consolas, monospace;--color-canvas: #09090b;--color-surface-subtle: #121215;--color-surface-hover: #18181c;--color-border: rgba(255, 255, 255, .08);--color-border-active: rgba(255, 255, 255, .28);--color-text-primary: #f4f4f5;--color-text-secondary: #82828c;--color-text-muted: #52525a;--color-text-inverse: #09090b;--radius-sharp: 2px}*{box-sizing:border-box;margin:0;padding:0;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-sans);background-color:var(--color-canvas);color:var(--color-text-primary);min-height:100vh;line-height:1.4;overflow-x:hidden}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:var(--color-canvas)}::-webkit-scrollbar-thumb{background:#27272a}::-webkit-scrollbar-thumb:hover{background:#3f3f46}.page-container{max-width:1120px;margin:0 auto;padding:48px 32px 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0;font-family:var(--font-mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--color-text-muted);border-bottom:1px solid var(--color-border)}.ledger-row{display:grid;grid-template-columns:1.2fr 1fr .9fr 36px;gap:16px;align-items:center;padding:14px 0;border-bottom:1px solid var(--color-border);transition:background .12s ease}.ledger-row:hover{background:#ffffff04}.input-ledger-name{background:transparent;border:none;font-family:var(--font-sans);font-size:.98rem;font-weight:500;color:var(--color-text-primary);outline:none;padding:4px 0}.input-ledger-name::placeholder{color:var(--color-text-muted)}.input-ledger-amount-wrap{display:flex;align-items:center;gap:6px;font-family:var(--font-mono)}.currency-mark{color:var(--color-text-muted);font-size:.9rem;-webkit-user-select:none;user-select:none}.input-ledger-amount{background:transparent;border:none;border-bottom:1px dashed 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ease}.btn-row-action:hover{color:#fff}.table-append-bar{display:flex;justify-content:flex-start;margin-top:20px}.settlement-stream{display:flex;flex-direction:column}.settlement-stream-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:8px;font-family:var(--font-mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--color-text-muted);border-bottom:1px solid var(--color-border)}.settlement-row{display:flex;align-items:center;justify-content:space-between;padding:16px 0;border-bottom:1px solid var(--color-border);gap:16px;transition:opacity .15s ease}.settlement-row.is-settled{opacity:.35;text-decoration:line-through}.settlement-direction{display:flex;align-items:center;gap:10px;font-size:.95rem}.settlement-party{font-weight:600;color:var(--color-text-primary)}.settlement-arrow{color:var(--color-text-muted);font-family:var(--font-mono);font-size:.85rem}.settlement-right{display:flex;align-items:center;gap:14px}.settlement-amount{font-family:var(--font-mono);font-size:1.05rem;font-weight:600;color:var(--color-text-primary);font-variant-numeric:tabular-nums;white-space:nowrap}.btn-settle-toggle{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;padding:4px 8px;background:transparent;border:1px solid var(--color-border);color:var(--color-text-secondary);border-radius:var(--radius-sharp);cursor:pointer;transition:all .12s ease}.btn-settle-toggle:hover{border-color:var(--color-border-active);color:var(--color-text-primary)}.btn-settle-toggle.active{background:#fff;color:var(--color-text-inverse);border-color:#fff;font-weight:600}.settlement-empty{padding:40px 0;color:var(--color-text-muted);font-size:.9rem;font-family:var(--font-mono);text-align:left}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000000e0;display:flex;align-items:center;justify-content:center;padding:24px;z-index:1000}.modal-box{background:var(--color-canvas);border:1px solid var(--color-border-active);border-radius:var(--radius-sharp);max-width:600px;width:100%;padding:32px;display:flex;flex-direction:column;gap:24px}.modal-header-line{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--color-border);padding-bottom:14px}.modal-title-text{font-family:var(--font-mono);font-size:.9rem;letter-spacing:.12em;text-transform:uppercase;color:var(--color-text-primary);font-weight:600}.modal-receipt-area{font-family:var(--font-mono);font-size:.82rem;line-height:1.7;color:#d4d4d8;background:#000;border:1px solid var(--color-border);border-radius:var(--radius-sharp);padding:18px;height:250px;width:100%;resize:none;outline:none}.modal-actions{display:flex;align-items:center;justify-content:flex-end;gap:12px}.math-step-block{display:flex;flex-direction:column;gap:8px;padding-bottom:18px;border-bottom:1px solid var(--color-border)}.math-step-title{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--color-text-primary);font-weight:600}.math-formula-box{font-family:var(--font-mono);font-size:.95rem;font-weight:600;color:#fff;background:#000;border:1px solid var(--color-border-active);border-radius:var(--radius-sharp);padding:12px 16px;letter-spacing:.05em}.math-step-desc{font-size:.82rem;color:var(--color-text-secondary);line-height:1.5}.math-live-eval{font-family:var(--font-mono);font-size:.78rem;color:#a1a1aa;background:#ffffff08;padding:8px 12px;border-left:2px solid #ffffff;border-radius:var(--radius-sharp);margin-top:4px}.masthead-footer{padding-top:32px;border-top:1px solid var(--color-border);display:flex;align-items:center;justify-content:space-between;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--color-text-muted)}